resource mailboxes

  1. Exchange Online Room Mailbox Utilization: No Native Report, Use PowerShell or Graph

    Microsoft’s Exchange Team said on May 21, 2026, that Exchange Online still lacks a native utilization report for resource mailboxes, leaving administrators to infer active use from calendar data through Exchange Online PowerShell, Microsoft Graph, or mailbox folder statistics. That is a small...
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    • Forum: Windows News